On Wed, Oct 04, 2017 at 06:29:23AM -0400, Nayna Jain wrote: > Currently, get_burstcount() function sleeps for 5msec in a loop > before retrying for next query to burstcount. However, if it takes > lesser time for TPM to return, this 5msec delay is longer > than necessary. > > This patch replaces the tpm_msleep time from 5msec to 1msec. > > After this change, performance on a TPM 1.2 with an 8 byte > burstcount for 1000 extends improved from ~10sec to ~9sec. > > Signed-off-by: Nayna Jain <nayna@xxxxxxxxxxxxxxxxxx> > Acked-by: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx> > --- > drivers/char/tpm/tpm_tis_core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c > index 224842e06105..826a0b9c9201 100644 > --- a/drivers/char/tpm/tpm_tis_core.c > +++ b/drivers/char/tpm/tpm_tis_core.c > @@ -226,7 +226,7 @@ static int get_burstcount(struct tpm_chip *chip) > burstcnt = (value >> 8) & 0xFFFF; > if (burstcnt) > return burstcnt; > - tpm_msleep(TPM_TIMEOUT); > + tpm_msleep(TPM_POLL_SLEEP); > } while (time_before(jiffies, stop)); > return -EBUSY; > } > -- > 2.13.3 > Would it make sense to squash this to 3/5 and merge the commit messages? /Jarkko
